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%I #22 Dec 06 2022 07:49:28
%S 261,275,293,309,330,348,366,391,412,440,464,495,521
%N 12-note scale in Hertz (rounded to integers).
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Pythagorean_tuning">Pythagorean tuning</a>.
%H <a href="/index/Mu#music">Index entries for sequences related to music</a>.
%F The scale involves 9/8 and 256/243 as fractions and the start is A = 440 Hz.
%F The initial term (rounded frequency of the C) is calculated as 16/27 * 440 Hz = 260.74 Hz, cf. the Wikipedia page on Pythagorean tuning for the ratios of the frequencies. - _M. F. Hasler_, Oct 07 2011
%Y Cf. A131062 for the corresponding C major scale. [_M. F. Hasler_, Oct 07 2011]
%Y Cf. A214832.
%K nonn
%O 1,1
%A _Hans Isdahl_, Sep 24 2007